Class: Calyx::Grammar::Production::Choices

Inherits:
Object
  • Object
show all
Defined in:
lib/calyx/grammar/production/choices.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(collection) ⇒ Choices

Returns a new instance of Choices.



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# File 'lib/calyx/grammar/production/choices.rb', line 16

def initialize(collection)
  @collection = collection
end

Class Method Details

.parse(productions, registry) ⇒ Object 



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# File 'lib/calyx/grammar/production/choices.rb', line 5

def self.parse(productions, registry)
  choices = productions.map do |choice|
    if choice.is_a?(String)
      Concat.parse(choice, registry)
    elsif choice.is_a?(Symbol)
      NonTerminal.new(choice, registry)
    end
  end
  self.new(choices)
end

Instance Method Details

#evaluate ⇒ Object 



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# File 'lib/calyx/grammar/production/choices.rb', line 20

def evaluate
  @collection.sample.evaluate
end